#include<iostream>
#include<queue>
using namespace std;
int main(){
int m,l,n;
cin>>m>>l>>n;
queue<int> boy,girl;
for(int i=1;i<=m;i++)boy.push(i);
for(int i=1;i<=l;i++)girl.push(i);
for(int i=1;i<=n;i++){
cout<<boy.front()<<" "<<girl.front()<<endl;
boy.push(boy.front());
girl.push(girl.front());
boy.pop();
girl.pop();
}
return 0;
}
